Javier M Guzman

US Patent:

53788850, Jan 3, 1995

Filed:

Oct 29, 1991

Appl. No.:

7/784582

Inventors:

Robert E. Jones - San Jose CA
Mark H. Kryder - Bradford Woods PA
Keith R. Mountfield - Pittsburgh PA
Javier I. Guzman - Pittsburgh PA

Assignee:

Mars Incorporated - McLean VA

International Classification:

G06K 708
G11B 5127

US Classification:

235449

Abstract:

A new and improved unshielded horizontal magnetoresistive head is disclosed which utilizes multiple pairs of magnetoresistive elements. The present invention provides a device which is characterized by reduced output signal undershoot amplitudes, and an increased central peak pulse amplitude, while not significantly affecting the resolution of the device. The device is also characterized by increased signal to noise and signal to interference ratios. Magnetoresistive elements utilized in the device may be fabricated and/or manufactured by simplified processes, resulting in fabrication, manufacturing and cost benefits for the magnetoresistive head. Any number of additional magnetoresistive element pairs may be utilized dependent on the accuracy and resolution required by the specific application.

US Patent:

51556430, Oct 13, 1992

Filed:

Oct 30, 1990

Appl. No.:

7/605513

Inventors:

Robert E. Jones - San Jose CA
Mark H. Kryder - Bradford Woods PA
Keith R. Mountfield - Pittsburgh PA
Javier I. Guzman - Pittsburgh PA

Assignee:

Mars Incorporated - McLean VA

International Classification:

G11B 533

US Classification:

360113

Abstract:

An unshielded horizontal magnetoresistive head for magnetic sensing and reading devices. The horizontal unshielded magnetoresistive head is comprised of two magnetoresistive elements separated by a gap and a conductive cross member which electrically connects the magnetoresistive elements together and to a common electrical point such as system ground. A differential voltage sensing circuit is connected across the magnetoresistive elements for sensing voltage variations when magnetic data is sensed by the head. The present invention further facilitates a more simplified fabrication process which results in cost savings and more efficient fabrication methods and procedures.

Author:

Javier Guzman

ISBN #:

8493005878